Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull fs/compat.c cleanups from Al Viro:
 "More moving of compat syscalls from fs/compat.c to fs/*.c where the
  native counterparts live.

  And death to compat_sys_getdents64() - the only architecture that used
  to need it was ia64, and _that_ has lost biarch support quite a few
  years ago"

* 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs/compat.c: trim unused includes
  move compat_rw_copy_check_uvector() over to fs/read_write.c
  fhandle: move compat syscalls from compat.c
  open: move compat syscalls from compat.c
  stat: move compat syscalls from compat.c
  fcntl: move compat syscalls from compat.c
  readdir: move compat syscalls from compat.c
  statfs: move compat syscalls from compat.c
  utimes: move compat syscalls from compat.c
  move compat select-related syscalls to fs/select.c
  Remove compat_sys_getdents64()

11 files changed, 1136 insertions, 1200 deletions

diff --git a/fs/compat.c b/fs/compat.c
index c61b506f5bc9..190b38b39d9e 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -15,555 +15,14 @@
  *  published by the Free Software Foundation.
  */
 
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/linkage.h>
 #include <linux/compat.h>
-#include <linux/errno.h>
-#include <linux/time.h>
-#include <linux/cred.h>
-#include <linux/fs.h>
-#include <linux/fcntl.h>
-#include <linux/namei.h>
-#include <linux/file.h>
-#include <linux/fdtable.h>
-#include <linux/vfs.h>
-#include <linux/ioctl.h>
-#include <linux/init.h>
 #include <linux/ncp_mount.h>
 #include <linux/nfs4_mount.h>
 #include <linux/syscalls.h>
-#include <linux/ctype.h>
-#include <linux/dirent.h>
-#include <linux/fsnotify.h>
-#include <linux/highuid.h>
-#include <linux/personality.h>
-#include <linux/rwsem.h>
-#include <linux/tsacct_kern.h>
-#include <linux/security.h>
-#include <linux/highmem.h>
-#include <linux/signal.h>
-#include <linux/poll.h>
-#include <linux/mm.h>
-#include <linux/fs_struct.h>
 #include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/aio.h>
-
 #include <linux/uaccess.h>
-#include <asm/mmu_context.h>
-#include <asm/ioctls.h>
 #include "internal.h"
 
-/*
- * Not all architectures have sys_utime, so implement this in terms
- * of sys_utimes.
- */
-COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
-		       struct compat_utimbuf __user *, t)
-{
-	struct timespec tv[2];
-
-	if (t) {
-		if (get_user(tv[0].tv_sec, &t->actime) ||
-		    get_user(tv[1].tv_sec, &t->modtime))
-			return -EFAULT;
-		tv[0].tv_nsec = 0;
-		tv[1].tv_nsec = 0;
-	}
-	return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
-}
-
-COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags)
-{
-	struct timespec tv[2];
-
-	if  (t) {
-		if (compat_get_timespec(&tv[0], &t[0]) ||
-		    compat_get_timespec(&tv[1], &t[1]))
-			return -EFAULT;
-
-		if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
-			return 0;
-	}
-	return do_utimes(dfd, filename, t ? tv : NULL, flags);
-}
-
-COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)
-{
-	struct timespec tv[2];
-
-	if (t) {
-		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
-		    get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
-		    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
-		    get_user(tv[1].tv_nsec, &t[1].tv_usec))
-			return -EFAULT;
-		if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
-		    tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
-			return -EINVAL;
-		tv[0].tv_nsec *= 1000;
-		tv[1].tv_nsec *= 1000;
-	}
-	return do_utimes(dfd, filename, t ? tv : NULL, 0);
-}
-
-COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)
-{
-	return compat_sys_futimesat(AT_FDCWD, filename, t);
-}
-
-static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
-{
-	struct compat_stat tmp;
-
-	if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
-		return -EOVERFLOW;
-
-	memset(&tmp, 0, sizeof(tmp));
-	tmp.st_dev = old_encode_dev(stat->dev);
-	tmp.st_ino = stat->ino;
-	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
-		return -EOVERFLOW;
-	tmp.st_mode = stat->mode;
-	tmp.st_nlink = stat->nlink;
-	if (tmp.st_nlink != stat->nlink)
-		return -EOVERFLOW;
-	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
-	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
-	tmp.st_rdev = old_encode_dev(stat->rdev);
-	if ((u64) stat->size > MAX_NON_LFS)
-		return -EOVERFLOW;
-	tmp.st_size = stat->size;
-	tmp.st_atime = stat->atime.tv_sec;
-	tmp.st_atime_nsec = stat->atime.tv_nsec;
-	tmp.st_mtime = stat->mtime.tv_sec;
-	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
-	tmp.st_ctime = stat->ctime.tv_sec;
-	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
-	tmp.st_blocks = stat->blocks;
-	tmp.st_blksize = stat->blksize;
-	return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
-}
-
-COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
-		       struct compat_stat __user *, statbuf)
-{
-	struct kstat stat;
-	int error;
-
-	error = vfs_stat(filename, &stat);
-	if (error)
-		return error;
-	return cp_compat_stat(&stat, statbuf);
-}
-
-COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename,
-		       struct compat_stat __user *, statbuf)
-{
-	struct kstat stat;
-	int error;
-
-	error = vfs_lstat(filename, &stat);
-	if (error)
-		return error;
-	return cp_compat_stat(&stat, statbuf);
-}
-
-#ifndef __ARCH_WANT_STAT64
-COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd,
-		       const char __user *, filename,
-		       struct compat_stat __user *, statbuf, int, flag)
-{
-	struct kstat stat;
-	int error;
-
-	error = vfs_fstatat(dfd, filename, &stat, flag);
-	if (error)
-		return error;
-	return cp_compat_stat(&stat, statbuf);
-}
-#endif
-
-COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
-		       struct compat_stat __user *, statbuf)
-{
-	struct kstat stat;
-	int error = vfs_fstat(fd, &stat);
-
-	if (!error)
-		error = cp_compat_stat(&stat, statbuf);
-	return error;
-}
-
-static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
-{
-	
-	if (sizeof ubuf->f_blocks == 4) {
-		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
-		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
-			return -EOVERFLOW;
-		/* f_files and f_ffree may be -1; it's okay
-		 * to stuff that into 32 bits */
-		if (kbuf->f_files != 0xffffffffffffffffULL
-		 && (kbuf->f_files & 0xffffffff00000000ULL))
-			return -EOVERFLOW;
-		if (kbuf->f_ffree != 0xffffffffffffffffULL
-		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
-			return -EOVERFLOW;
-	}
-	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
-	    __put_user(kbuf->f_type, &ubuf->f_type) ||
-	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
-	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
-	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
-	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
-	    __put_user(kbuf->f_files, &ubuf->f_files) ||
-	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
-	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
-	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
-	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
-	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
-	    __put_user(kbuf->f_flags, &ubuf->f_flags) ||
-	    __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
-		return -EFAULT;
-	return 0;
-}
-
-/*
- * The following statfs calls are copies of code from fs/statfs.c and
- * should be checked against those from time to time
- */
-COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
-{
-	struct kstatfs tmp;
-	int error = user_statfs(pathname, &tmp);
-	if (!error)
-		error = put_compat_statfs(buf, &tmp);
-	return error;
-}
-
-COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
-{
-	struct kstatfs tmp;
-	int error = fd_statfs(fd, &tmp);
-	if (!error)
-		error = put_compat_statfs(buf, &tmp);
-	return error;
-}
-
-static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
-{
-	if (sizeof(ubuf->f_bsize) == 4) {
-		if ((kbuf->f_type | kbuf->f_bsize | kbuf->f_namelen |
-		     kbuf->f_frsize | kbuf->f_flags) & 0xffffffff00000000ULL)
-			return -EOVERFLOW;
-		/* f_files and f_ffree may be -1; it's okay
-		 * to stuff that into 32 bits */
-		if (kbuf->f_files != 0xffffffffffffffffULL
-		 && (kbuf->f_files & 0xffffffff00000000ULL))
-			return -EOVERFLOW;
-		if (kbuf->f_ffree != 0xffffffffffffffffULL
-		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
-			return -EOVERFLOW;
-	}
-	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
-	    __put_user(kbuf->f_type, &ubuf->f_type) ||
-	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
-	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
-	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
-	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
-	    __put_user(kbuf->f_files, &ubuf->f_files) ||
-	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
-	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
-	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
-	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
-	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
-	    __put_user(kbuf->f_flags, &ubuf->f_flags) ||
-	    __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
-		return -EFAULT;
-	return 0;
-}
-
-COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
-{
-	struct kstatfs tmp;
-	int error;
-
-	if (sz != sizeof(*buf))
-		return -EINVAL;
-
-	error = user_statfs(pathname, &tmp);
-	if (!error)
-		error = put_compat_statfs64(buf, &tmp);
-	return error;
-}
-
-COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
-{
-	struct kstatfs tmp;
-	int error;
-
-	if (sz != sizeof(*buf))
-		return -EINVAL;
-
-	error = fd_statfs(fd, &tmp);
-	if (!error)
-		error = put_compat_statfs64(buf, &tmp);
-	return error;
-}
-
-/*
- * This is a copy of sys_ustat, just dealing with a structure layout.
- * Given how simple this syscall is that apporach is more maintainable
- * than the various conversion hacks.
- */
-COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
-{
-	struct compat_ustat tmp;
-	struct kstatfs sbuf;
-	int err = vfs_ustat(new_decode_dev(dev), &sbuf);
-	if (err)
-		return err;
-
-	memset(&tmp, 0, sizeof(struct compat_ustat));
-	tmp.f_tfree = sbuf.f_bfree;
-	tmp.f_tinode = sbuf.f_ffree;
-	if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
-		return -EFAULT;
-	return 0;
-}
-
-static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
-{
-	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
-	    __get_user(kfl->l_type, &ufl->l_type) ||
-	    __get_user(kfl->l_whence, &ufl->l_whence) ||
-	    __get_user(kfl->l_start, &ufl->l_start) ||
-	    __get_user(kfl->l_len, &ufl->l_len) ||
-	    __get_user(kfl->l_pid, &ufl->l_pid))
-		return -EFAULT;
-	return 0;
-}
-
-static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
-{
-	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
-	    __put_user(kfl->l_type, &ufl->l_type) ||
-	    __put_user(kfl->l_whence, &ufl->l_whence) ||
-	    __put_user(kfl->l_start, &ufl->l_start) ||
-	    __put_user(kfl->l_len, &ufl->l_len) ||
-	    __put_user(kfl->l_pid, &ufl->l_pid))
-		return -EFAULT;
-	return 0;
-}
-
-#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
-static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
-{
-	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
-	    __get_user(kfl->l_type, &ufl->l_type) ||
-	    __get_user(kfl->l_whence, &ufl->l_whence) ||
-	    __get_user(kfl->l_start, &ufl->l_start) ||
-	    __get_user(kfl->l_len, &ufl->l_len) ||
-	    __get_user(kfl->l_pid, &ufl->l_pid))
-		return -EFAULT;
-	return 0;
-}
-#endif
-
-#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
-static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
-{
-	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
-	    __put_user(kfl->l_type, &ufl->l_type) ||
-	    __put_user(kfl->l_whence, &ufl->l_whence) ||
-	    __put_user(kfl->l_start, &ufl->l_start) ||
-	    __put_user(kfl->l_len, &ufl->l_len) ||
-	    __put_user(kfl->l_pid, &ufl->l_pid))
-		return -EFAULT;
-	return 0;
-}
-#endif
-
-static unsigned int
-convert_fcntl_cmd(unsigned int cmd)
-{
-	switch (cmd) {
-	case F_GETLK64:
-		return F_GETLK;
-	case F_SETLK64:
-		return F_SETLK;
-	case F_SETLKW64:
-		return F_SETLKW;
-	}
-
-	return cmd;
-}
-
-COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
-		       compat_ulong_t, arg)
-{
-	mm_segment_t old_fs;
-	struct flock f;
-	long ret;
-	unsigned int conv_cmd;
-
-	switch (cmd) {
-	case F_GETLK:
-	case F_SETLK:
-	case F_SETLKW:
-		ret = get_compat_flock(&f, compat_ptr(arg));
-		if (ret != 0)
-			break;
-		old_fs = get_fs();
-		set_fs(KERNEL_DS);
-		ret = sys_fcntl(fd, cmd, (unsigned long)&f);
-		set_fs(old_fs);
-		if (cmd == F_GETLK && ret == 0) {
-			/* GETLK was successful and we need to return the data...
-			 * but it needs to fit in the compat structure.
-			 * l_start shouldn't be too big, unless the original
-			 * start + end is greater than COMPAT_OFF_T_MAX, in which
-			 * case the app was asking for trouble, so we return
-			 * -EOVERFLOW in that case.
-			 * l_len could be too big, in which case we just truncate it,
-			 * and only allow the app to see that part of the conflicting
-			 * lock that might make sense to it anyway
-			 */
-
-			if (f.l_start > COMPAT_OFF_T_MAX)
-				ret = -EOVERFLOW;
-			if (f.l_len > COMPAT_OFF_T_MAX)
-				f.l_len = COMPAT_OFF_T_MAX;
-			if (ret == 0)
-				ret = put_compat_flock(&f, compat_ptr(arg));
-		}
-		break;
-
-	case F_GETLK64:
-	case F_SETLK64:
-	case F_SETLKW64:
-	case F_OFD_GETLK:
-	case F_OFD_SETLK:
-	case F_OFD_SETLKW:
-		ret = get_compat_flock64(&f, compat_ptr(arg));
-		if (ret != 0)
-			break;
-		old_fs = get_fs();
-		set_fs(KERNEL_DS);
-		conv_cmd = convert_fcntl_cmd(cmd);
-		ret = sys_fcntl(fd, conv_cmd, (unsigned long)&f);
-		set_fs(old_fs);
-		if ((conv_cmd == F_GETLK || conv_cmd == F_OFD_GETLK) && ret == 0) {
-			/* need to return lock information - see above for commentary */
-			if (f.l_start > COMPAT_LOFF_T_MAX)
-				ret = -EOVERFLOW;
-			if (f.l_len > COMPAT_LOFF_T_MAX)
-				f.l_len = COMPAT_LOFF_T_MAX;
-			if (ret == 0)
-				ret = put_compat_flock64(&f, compat_ptr(arg));
-		}
-		break;
-
-	default:
-		ret = sys_fcntl(fd, cmd, arg);
-		break;
-	}
-	return ret;
-}
-
-COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
-		       compat_ulong_t, arg)
-{
-	switch (cmd) {
-	case F_GETLK64:
-	case F_SETLK64:
-	case F_SETLKW64:
-	case F_OFD_GETLK:
-	case F_OFD_SETLK:
-	case F_OFD_SETLKW:
-		return -EINVAL;
-	}
-	return compat_sys_fcntl64(fd, cmd, arg);
-}
-
-/* A write operation does a read from user space and vice versa */
-#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
-
-ssize_t compat_rw_copy_check_uvector(int type,
-		const struct compat_iovec __user *uvector, unsigned long nr_segs,
-		unsigned long fast_segs, struct iovec *fast_pointer,
-		struct iovec **ret_pointer)
-{
-	compat_ssize_t tot_len;
-	struct iovec *iov = *ret_pointer = fast_pointer;
-	ssize_t ret = 0;
-	int seg;
-
-	/*
-	 * SuS says "The readv() function *may* fail if the iovcnt argument
-	 * was less than or equal to 0, or greater than {IOV_MAX}.  Linux has
-	 * traditionally returned zero for zero segments, so...
-	 */
-	if (nr_segs == 0)
-		goto out;
-
-	ret = -EINVAL;
-	if (nr_segs > UIO_MAXIOV)
-		goto out;
-	if (nr_segs > fast_segs) {
-		ret = -ENOMEM;
-		iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
-		if (iov == NULL)
-			goto out;
-	}
-	*ret_pointer = iov;
-
-	ret = -EFAULT;
-	if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
-		goto out;
-
-	/*
-	 * Single unix specification:
-	 * We should -EINVAL if an element length is not >= 0 and fitting an
-	 * ssize_t.
-	 *
-	 * In Linux, the total length is limited to MAX_RW_COUNT, there is
-	 * no overflow possibility.
-	 */
-	tot_len = 0;
-	ret = -EINVAL;
-	for (seg = 0; seg < nr_segs; seg++) {
-		compat_uptr_t buf;
-		compat_ssize_t len;
-
-		if (__get_user(len, &uvector->iov_len) ||
-		   __get_user(buf, &uvector->iov_base)) {
-			ret = -EFAULT;
-			goto out;
-		}
-		if (len < 0)	/* size_t not fitting in compat_ssize_t .. */
-			goto out;
-		if (type >= 0 &&
-		    !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
-			ret = -EFAULT;
-			goto out;
-		}
-		if (len > MAX_RW_COUNT - tot_len)
-			len = MAX_RW_COUNT - tot_len;
-		tot_len += len;
-		iov->iov_base = compat_ptr(buf);
-		iov->iov_len = (compat_size_t) len;
-		uvector++;
-		iov++;
-	}
-	ret = tot_len;
-
-out:
-	return ret;
-}
-
 struct compat_ncp_mount_data {
 	compat_int_t version;
 	compat_uint_t ncp_fd;
@@ -744,653 +203,3 @@ COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name,
  out:
 	return retval;
 }
-
-struct compat_old_linux_dirent {
-	compat_ulong_t	d_ino;
-	compat_ulong_t	d_offset;
-	unsigned short	d_namlen;
-	char		d_name[1];
-};
-
-struct compat_readdir_callback {
-	struct dir_context ctx;
-	struct compat_old_linux_dirent __user *dirent;
-	int result;
-};
-
-static int compat_fillonedir(struct dir_context *ctx, const char *name,
-			     int namlen, loff_t offset, u64 ino,
-			     unsigned int d_type)
-{
-	struct compat_readdir_callback *buf =
-		container_of(ctx, struct compat_readdir_callback, ctx);
-	struct compat_old_linux_dirent __user *dirent;
-	compat_ulong_t d_ino;
-
-	if (buf->result)
-		return -EINVAL;
-	d_ino = ino;
-	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
-		buf->result = -EOVERFLOW;
-		return -EOVERFLOW;
-	}
-	buf->result++;
-	dirent = buf->dirent;
-	if (!access_ok(VERIFY_WRITE, dirent,
-			(unsigned long)(dirent->d_name + namlen + 1) -
-				(unsigned long)dirent))
-		goto efault;
-	if (	__put_user(d_ino, &dirent->d_ino) ||
-		__put_user(offset, &dirent->d_offset) ||
-		__put_user(namlen, &dirent->d_namlen) ||
-		__copy_to_user(dirent->d_name, name, namlen) ||
-		__put_user(0, dirent->d_name + namlen))
-		goto efault;
-	return 0;
-efault:
-	buf->result = -EFAULT;
-	return -EFAULT;
-}
-
-COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
-		struct compat_old_linux_dirent __user *, dirent, unsigned int, count)
-{
-	int error;
-	struct fd f = fdget_pos(fd);
-	struct compat_readdir_callback buf = {
-		.ctx.actor = compat_fillonedir,
-		.dirent = dirent
-	};
-
-	if (!f.file)
-		return -EBADF;
-
-	error = iterate_dir(f.file, &buf.ctx);
-	if (buf.result)
-		error = buf.result;
-
-	fdput_pos(f);
-	return error;
-}
-
-struct compat_linux_dirent {
-	compat_ulong_t	d_ino;
-	compat_ulong_t	d_off;
-	unsigned short	d_reclen;
-	char		d_name[1];
-};
-
-struct compat_getdents_callback {
-	struct dir_context ctx;
-	struct compat_linux_dirent __user *current_dir;
-	struct compat_linux_dirent __user *previous;
-	int count;
-	int error;
-};
-
-static int compat_filldir(struct dir_context *ctx, const char *name, int namlen,
-		loff_t offset, u64 ino, unsigned int d_type)
-{
-	struct compat_linux_dirent __user * dirent;
-	struct compat_getdents_callback *buf =
-		container_of(ctx, struct compat_getdents_callback, ctx);
-	compat_ulong_t d_ino;
-	int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
-		namlen + 2, sizeof(compat_long_t));
-
-	buf->error = -EINVAL;	/* only used if we fail.. */
-	if (reclen > buf->count)
-		return -EINVAL;
-	d_ino = ino;
-	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
-		buf->error = -EOVERFLOW;
-		return -EOVERFLOW;
-	}
-	dirent = buf->previous;
-	if (dirent) {
-		if (signal_pending(current))
-			return -EINTR;
-		if (__put_user(offset, &dirent->d_off))
-			goto efault;
-	}
-	dirent = buf->current_dir;
-	if (__put_user(d_ino, &dirent->d_ino))
-		goto efault;
-	if (__put_user(reclen, &dirent->d_reclen))
-		goto efault;
-	if (copy_to_user(dirent->d_name, name, namlen))
-		goto efault;
-	if (__put_user(0, dirent->d_name + namlen))
-		goto efault;
-	if (__put_user(d_type, (char  __user *) dirent + reclen - 1))
-		goto efault;
-	buf->previous = dirent;
-	dirent = (void __user *)dirent + reclen;
-	buf->current_dir = dirent;
-	buf->count -= reclen;
-	return 0;
-efault:
-	buf->error = -EFAULT;
-	return -EFAULT;
-}
-
-COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
-		struct compat_linux_dirent __user *, dirent, unsigned int, count)
-{
-	struct fd f;
-	struct compat_linux_dirent __user * lastdirent;
-	struct compat_getdents_callback buf = {
-		.ctx.actor = compat_filldir,
-		.current_dir = dirent,
-		.count = count
-	};
-	int error;
-
-	if (!access_ok(VERIFY_WRITE, dirent, count))
-		return -EFAULT;
-
-	f = fdget_pos(fd);
-	if (!f.file)
-		return -EBADF;
-
-	error = iterate_dir(f.file, &buf.ctx);
-	if (error >= 0)
-		error = buf.error;
-	lastdirent = buf.previous;
-	if (lastdirent) {
-		if (put_user(buf.ctx.pos, &lastdirent->d_off))
-			error = -EFAULT;
-		else
-			error = count - buf.count;
-	}
-	fdput_pos(f);
-	return error;
-}
-
-#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
-
-struct compat_getdents_callback64 {
-	struct dir_context ctx;
-	struct linux_dirent64 __user *current_dir;
-	struct linux_dirent64 __user *previous;
-	int count;
-	int error;
-};
-
-static int compat_filldir64(struct dir_context *ctx, const char *name,
-			    int namlen, loff_t offset, u64 ino,
-			    unsigned int d_type)
-{
-	struct linux_dirent64 __user *dirent;
-	struct compat_getdents_callback64 *buf =
-		container_of(ctx, struct compat_getdents_callback64, ctx);
-	int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
-		sizeof(u64));
-	u64 off;
-
-	buf->error = -EINVAL;	/* only used if we fail.. */
-	if (reclen > buf->count)
-		return -EINVAL;
-	dirent = buf->previous;
-
-	if (dirent) {
-		if (signal_pending(current))
-			return -EINTR;
-		if (__put_user_unaligned(offset, &dirent->d_off))
-			goto efault;
-	}
-	dirent = buf->current_dir;
-	if (__put_user_unaligned(ino, &dirent->d_ino))
-		goto efault;
-	off = 0;
-	if (__put_user_unaligned(off, &dirent->d_off))
-		goto efault;
-	if (__put_user(reclen, &dirent->d_reclen))
-		goto efault;
-	if (__put_user(d_type, &dirent->d_type))
-		goto efault;
-	if (copy_to_user(dirent->d_name, name, namlen))
-		goto efault;
-	if (__put_user(0, dirent->d_name + namlen))
-		goto efault;
-	buf->previous = dirent;
-	dirent = (void __user *)dirent + reclen;
-	buf->current_dir = dirent;
-	buf->count -= reclen;
-	return 0;
-efault:
-	buf->error = -EFAULT;
-	return -EFAULT;
-}
-
-COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd,
-		struct linux_dirent64 __user *, dirent, unsigned int, count)
-{
-	struct fd f;
-	struct linux_dirent64 __user * lastdirent;
-	struct compat_getdents_callback64 buf = {
-		.ctx.actor = compat_filldir64,
-		.current_dir = dirent,
-		.count = count
-	};
-	int error;
-
-	if (!access_ok(VERIFY_WRITE, dirent, count))
-		return -EFAULT;
-
-	f = fdget_pos(fd);
-	if (!f.file)
-		return -EBADF;
-
-	error = iterate_dir(f.file, &buf.ctx);
-	if (error >= 0)
-		error = buf.error;
-	lastdirent = buf.previous;
-	if (lastdirent) {
-		typeof(lastdirent->d_off) d_off = buf.ctx.pos;
-		if (__put_user_unaligned(d_off, &lastdirent->d_off))
-			error = -EFAULT;
-		else
-			error = count - buf.count;
-	}
-	fdput_pos(f);
-	return error;
-}
-#endif /* __ARCH_WANT_COMPAT_SYS_GETDENTS64 */
-
-/*
- * Exactly like fs/open.c:sys_open(), except that it doesn't set the
- * O_LARGEFILE flag.
- */
-COMPAT_SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode)
-{
-	return do_sys_open(AT_FDCWD, filename, flags, mode);
-}
-
-/*
- * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
- * O_LARGEFILE flag.
- */
-COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode)
-{
-	return do_sys_open(dfd, filename, flags, mode);
-}
-
-#define __COMPAT_NFDBITS       (8 * sizeof(compat_ulong_t))
-
-static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
-				      int timeval, int ret)
-{
-	struct timespec ts;
-
-	if (!p)
-		return ret;
-
-	if (current->personality & STICKY_TIMEOUTS)
-		goto sticky;
-
-	/* No update for zero timeout */
-	if (!end_time->tv_sec && !end_time->tv_nsec)
-		return ret;
-
-	ktime_get_ts(&ts);
-	ts = timespec_sub(*end_time, ts);
-	if (ts.tv_sec < 0)
-		ts.tv_sec = ts.tv_nsec = 0;
-
-	if (timeval) {
-		struct compat_timeval rtv;
-
-		rtv.tv_sec = ts.tv_sec;
-		rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
-
-		if (!copy_to_user(p, &rtv, sizeof(rtv)))
-			return ret;
-	} else {
-		struct compat_timespec rts;
-
-		rts.tv_sec = ts.tv_sec;
-		rts.tv_nsec = ts.tv_nsec;
-
-		if (!copy_to_user(p, &rts, sizeof(rts)))
-			return ret;
-	}
-	/*
-	 * If an application puts its timeval in read-only memory, we
-	 * don't want the Linux-specific update to the timeval to
-	 * cause a fault after the select has completed
-	 * successfully. However, because we're not updating the
-	 * timeval, we can't restart the system call.
-	 */
-
-sticky:
-	if (ret == -ERESTARTNOHAND)
-		ret = -EINTR;
-	return ret;
-}
-
-/*
- * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
- * 64-bit unsigned longs.
- */
-static
-int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
-			unsigned long *fdset)
-{
-	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
-	if (ufdset) {
-		unsigned long odd;
-
-		if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
-			return -EFAULT;
-
-		odd = nr & 1UL;
-		nr &= ~1UL;
-		while (nr) {
-			unsigned long h, l;
-			if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
-				return -EFAULT;
-			ufdset += 2;
-			*fdset++ = h << 32 | l;
-			nr -= 2;
-		}
-		if (odd && __get_user(*fdset, ufdset))
-			return -EFAULT;
-	} else {
-		/* Tricky, must clear full unsigned long in the
-		 * kernel fdset at the end, this makes sure that
-		 * actually happens.
-		 */
-		memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
-	}
-	return 0;
-}
-
-static
-int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
-		      unsigned long *fdset)
-{
-	unsigned long odd;
-	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
-
-	if (!ufdset)
-		return 0;
-
-	odd = nr & 1UL;
-	nr &= ~1UL;
-	while (nr) {
-		unsigned long h, l;
-		l = *fdset++;
-		h = l >> 32;
-		if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
-			return -EFAULT;
-		ufdset += 2;
-		nr -= 2;
-	}
-	if (odd && __put_user(*fdset, ufdset))
-		return -EFAULT;
-	return 0;
-}
-
-
-/*
- * This is a virtual copy of sys_select from fs/select.c and probably
- * should be compared to it from time to time
- */
-
-/*
- * We can actually return ERESTARTSYS instead of EINTR, but I'd
- * like to be certain this leads to no problems. So I return
- * EINTR just for safety.
- *
- * Update: ERESTARTSYS breaks at least the xview clock binary, so
- * I'm trying ERESTARTNOHAND which restart only when you want to.
- */
-int compat_core_sys_select(int n, compat_ulong_t __user *inp,
-	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
-	struct timespec *end_time)
-{
-	fd_set_bits fds;
-	void *bits;
-	int size, max_fds, ret = -EINVAL;
-	struct fdtable *fdt;
-	long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
-
-	if (n < 0)
-		goto out_nofds;
-
-	/* max_fds can increase, so grab it once to avoid race */
-	rcu_read_lock();
-	fdt = files_fdtable(current->files);
-	max_fds = fdt->max_fds;
-	rcu_read_unlock();
-	if (n > max_fds)
-		n = max_fds;
-
-	/*
-	 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
-	 * since we used fdset we need to allocate memory in units of
-	 * long-words.
-	 */
-	size = FDS_BYTES(n);
-	bits = stack_fds;
-	if (size > sizeof(stack_fds) / 6) {
-		bits = kmalloc(6 * size, GFP_KERNEL);
-		ret = -ENOMEM;
-		if (!bits)
-			goto out_nofds;
-	}
-	fds.in      = (unsigned long *)  bits;
-	fds.out     = (unsigned long *) (bits +   size);
-	fds.ex      = (unsigned long *) (bits + 2*size);
-	fds.res_in  = (unsigned long *) (bits + 3*size);
-	fds.res_out = (unsigned long *) (bits + 4*size);
-	fds.res_ex  = (unsigned long *) (bits + 5*size);
-
-	if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
-	    (ret = compat_get_fd_set(n, outp, fds.out)) ||
-	    (ret = compat_get_fd_set(n, exp, fds.ex)))
-		goto out;
-	zero_fd_set(n, fds.res_in);
-	zero_fd_set(n, fds.res_out);
-	zero_fd_set(n, fds.res_ex);
-
-	ret = do_select(n, &fds, end_time);
-
-	if (ret < 0)
-		goto out;
-	if (!ret) {
-		ret = -ERESTARTNOHAND;
-		if (signal_pending(current))
-			goto out;
-		ret = 0;
-	}
-
-	if (compat_set_fd_set(n, inp, fds.res_in) ||
-	    compat_set_fd_set(n, outp, fds.res_out) ||
-	    compat_set_fd_set(n, exp, fds.res_ex))
-		ret = -EFAULT;
-out:
-	if (bits != stack_fds)
-		kfree(bits);
-out_nofds:
-	return ret;
-}
-
-COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,
-	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
-	struct compat_timeval __user *, tvp)
-{
-	struct timespec end_time, *to = NULL;
-	struct compat_timeval tv;
-	int ret;
-
-	if (tvp) {
-		if (copy_from_user(&tv, tvp, sizeof(tv)))
-			return -EFAULT;
-
-		to = &end_time;
-		if (poll_select_set_timeout(to,
-				tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
-				(tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
-			return -EINVAL;
-	}
-
-	ret = compat_core_sys_select(n, inp, outp, exp, to);
-	ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
-
-	return ret;
-}
-
-struct compat_sel_arg_struct {
-	compat_ulong_t n;
-	compat_uptr_t inp;
-	compat_uptr_t outp;
-	compat_uptr_t exp;
-	compat_uptr_t tvp;
-};
-
-COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg)
-{
-	struct compat_sel_arg_struct a;
-
-	if (copy_from_user(&a, arg, sizeof(a)))
-		return -EFAULT;
-	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
-				 compat_ptr(a.exp), compat_ptr(a.tvp));
-}
-
-static long do_compat_pselect(int n, compat_ulong_t __user *inp,
-	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
-	struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
-	compat_size_t sigsetsize)
-{
-	compat_sigset_t ss32;
-	sigset_t ksigmask, sigsaved;
-	struct compat_timespec ts;
-	struct timespec end_time, *to = NULL;
-	int ret;
-
-	if (tsp) {
-		if (copy_from_user(&ts, tsp, sizeof(ts)))
-			return -EFAULT;
-
-		to = &end_time;
-		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
-			return -EINVAL;
-	}
-
-	if (sigmask) {
-		if (sigsetsize != sizeof(compat_sigset_t))
-			return -EINVAL;
-		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
-			return -EFAULT;
-		sigset_from_compat(&ksigmask, &ss32);
-
-		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
-		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
-	}
-
-	ret = compat_core_sys_select(n, inp, outp, exp, to);
-	ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
-
-	if (ret == -ERESTARTNOHAND) {
-		/*
-		 * Don't restore the signal mask yet. Let do_signal() deliver
-		 * the signal on the way back to userspace, before the signal
-		 * mask is restored.
-		 */
-		if (sigmask) {
-			memcpy(&current->saved_sigmask, &sigsaved,
-					sizeof(sigsaved));
-			set_restore_sigmask();
-		}
-	} else if (sigmask)
-		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
-
-	return ret;
-}
-
-COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
-	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
-	struct compat_timespec __user *, tsp, void __user *, sig)
-{
-	compat_size_t sigsetsize = 0;
-	compat_uptr_t up = 0;
-
-	if (sig) {
-		if (!access_ok(VERIFY_READ, sig,
-				sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
-		    	__get_user(up, (compat_uptr_t __user *)sig) ||
-		    	__get_user(sigsetsize,
-				(compat_size_t __user *)(sig+sizeof(up))))
-			return -EFAULT;
-	}
-	return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
-				 sigsetsize);
-}
-
-COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
-	unsigned int,  nfds, struct compat_timespec __user *, tsp,
-	const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
-{
-	compat_sigset_t ss32;
-	sigset_t ksigmask, sigsaved;
-	struct compat_timespec ts;
-	struct timespec end_time, *to = NULL;
-	int ret;
-
-	if (tsp) {
-		if (copy_from_user(&ts, tsp, sizeof(ts)))
-			return -EFAULT;
-
-		to = &end_time;
-		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
-			return -EINVAL;
-	}
-
-	if (sigmask) {
-		if (sigsetsize != sizeof(compat_sigset_t))
-			return -EINVAL;
-		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
-			return -EFAULT;
-		sigset_from_compat(&ksigmask, &ss32);
-
-		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
-		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
-	}
-
-	ret = do_sys_poll(ufds, nfds, to);
-
-	/* We can restart this syscall, usually */
-	if (ret == -EINTR) {
-		/*
-		 * Don't restore the signal mask yet. Let do_signal() deliver
-		 * the signal on the way back to userspace, before the signal
-		 * mask is restored.
-		 */
-		if (sigmask) {
-			memcpy(&current->saved_sigmask, &sigsaved,
-				sizeof(sigsaved));
-			set_restore_sigmask();
-		}
-		ret = -ERESTARTNOHAND;
-	} else if (sigmask)
-		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
-
-	ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
-
-	return ret;
-}
-
-#ifdef CONFIG_FHANDLE
-/*
- * Exactly like fs/open.c:sys_open_by_handle_at(), except that it
- * doesn't set the O_LARGEFILE flag.
- */
-COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
-			     struct file_handle __user *, handle, int, flags)
-{
-	return do_handle_open(mountdirfd, handle, flags);
-}
-#endif
diff --git a/fs/fcntl.c b/fs/fcntl.c
index be8fbe289087..8bd81c2e89b2 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -23,6 +23,7 @@
 #include <linux/pid_namespace.h>
 #include <linux/user_namespace.h>
 #include <linux/shmem_fs.h>
+#include <linux/compat.h>
 
 #include <asm/poll.h>
 #include <asm/siginfo.h>
@@ -420,6 +421,162 @@ out:
 }
 #endif
 
+#ifdef CONFIG_COMPAT
+static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+	    __get_user(kfl->l_type, &ufl->l_type) ||
+	    __get_user(kfl->l_whence, &ufl->l_whence) ||
+	    __get_user(kfl->l_start, &ufl->l_start) ||
+	    __get_user(kfl->l_len, &ufl->l_len) ||
+	    __get_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+
+static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+	    __put_user(kfl->l_type, &ufl->l_type) ||
+	    __put_user(kfl->l_whence, &ufl->l_whence) ||
+	    __put_user(kfl->l_start, &ufl->l_start) ||
+	    __put_user(kfl->l_len, &ufl->l_len) ||
+	    __put_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+
+#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
+static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+	    __get_user(kfl->l_type, &ufl->l_type) ||
+	    __get_user(kfl->l_whence, &ufl->l_whence) ||
+	    __get_user(kfl->l_start, &ufl->l_start) ||
+	    __get_user(kfl->l_len, &ufl->l_len) ||
+	    __get_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
+static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+	    __put_user(kfl->l_type, &ufl->l_type) ||
+	    __put_user(kfl->l_whence, &ufl->l_whence) ||
+	    __put_user(kfl->l_start, &ufl->l_start) ||
+	    __put_user(kfl->l_len, &ufl->l_len) ||
+	    __put_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+static unsigned int
+convert_fcntl_cmd(unsigned int cmd)
+{
+	switch (cmd) {
+	case F_GETLK64:
+		return F_GETLK;
+	case F_SETLK64:
+		return F_SETLK;
+	case F_SETLKW64:
+		return F_SETLKW;
+	}
+
+	return cmd;
+}
+
+COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg)
+{
+	mm_segment_t old_fs;
+	struct flock f;
+	long ret;
+	unsigned int conv_cmd;
+
+	switch (cmd) {
+	case F_GETLK:
+	case F_SETLK:
+	case F_SETLKW:
+		ret = get_compat_flock(&f, compat_ptr(arg));
+		if (ret != 0)
+			break;
+		old_fs = get_fs();
+		set_fs(KERNEL_DS);
+		ret = sys_fcntl(fd, cmd, (unsigned long)&f);
+		set_fs(old_fs);
+		if (cmd == F_GETLK && ret == 0) {
+			/* GETLK was successful and we need to return the data...
+			 * but it needs to fit in the compat structure.
+			 * l_start shouldn't be too big, unless the original
+			 * start + end is greater than COMPAT_OFF_T_MAX, in which
+			 * case the app was asking for trouble, so we return
+			 * -EOVERFLOW in that case.
+			 * l_len could be too big, in which case we just truncate it,
+			 * and only allow the app to see that part of the conflicting
+			 * lock that might make sense to it anyway
+			 */
+
+			if (f.l_start > COMPAT_OFF_T_MAX)
+				ret = -EOVERFLOW;
+			if (f.l_len > COMPAT_OFF_T_MAX)
+				f.l_len = COMPAT_OFF_T_MAX;
+			if (ret == 0)
+				ret = put_compat_flock(&f, compat_ptr(arg));
+		}
+		break;
+
+	case F_GETLK64:
+	case F_SETLK64:
+	case F_SETLKW64:
+	case F_OFD_GETLK:
+	case F_OFD_SETLK:
+	case F_OFD_SETLKW:
+		ret = get_compat_flock64(&f, compat_ptr(arg));
+		if (ret != 0)
+			break;
+		old_fs = get_fs();
+		set_fs(KERNEL_DS);
+		conv_cmd = convert_fcntl_cmd(cmd);
+		ret = sys_fcntl(fd, conv_cmd, (unsigned long)&f);
+		set_fs(old_fs);
+		if ((conv_cmd == F_GETLK || conv_cmd == F_OFD_GETLK) && ret == 0) {
+			/* need to return lock information - see above for commentary */
+			if (f.l_start > COMPAT_LOFF_T_MAX)
+				ret = -EOVERFLOW;
+			if (f.l_len > COMPAT_LOFF_T_MAX)
+				f.l_len = COMPAT_LOFF_T_MAX;
+			if (ret == 0)
+				ret = put_compat_flock64(&f, compat_ptr(arg));
+		}
+		break;
+
+	default:
+		ret = sys_fcntl(fd, cmd, arg);
+		break;
+	}
+	return ret;
+}
+
+COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg)
+{
+	switch (cmd) {
+	case F_GETLK64:
+	case F_SETLK64:
+	case F_SETLKW64:
+	case F_OFD_GETLK:
+	case F_OFD_SETLK:
+	case F_OFD_SETLKW:
+		return -EINVAL;
+	}
+	return compat_sys_fcntl64(fd, cmd, arg);
+}
+#endif
+
 /* Table to convert sigio signal codes into poll band bitmaps */
 
 static const long band_table[NSIGPOLL] = {
diff --git a/fs/fhandle.c b/fs/fhandle.c
index 5559168d5637..58a61f55e0d0 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -9,6 +9,7 @@
 #include <linux/fsnotify.h>
 #include <linux/personality.h>
 #include <linux/uaccess.h>
+#include <linux/compat.h>
 #include "internal.h"
 #include "mount.h"
 
@@ -264,3 +265,15 @@ SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
 	ret = do_handle_open(mountdirfd, handle, flags);
 	return ret;
 }
+
+#ifdef CONFIG_COMPAT
+/*
+ * Exactly like fs/open.c:sys_open_by_handle_at(), except that it
+ * doesn't set the O_LARGEFILE flag.
+ */
+COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
+			     struct file_handle __user *, handle, int, flags)
+{
+	return do_handle_open(mountdirfd, handle, flags);
+}
+#endif
diff --git a/fs/internal.h b/fs/internal.h
index 11c6d89dce9c..076751d90ba2 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -108,8 +108,6 @@ extern struct file *do_filp_open(int dfd, struct filename *pathname,
 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 		const char *, const struct open_flags *);
 
-extern long do_handle_open(int mountdirfd,
-			   struct file_handle __user *ufh, int open_flag);
 extern int open_check_o_direct(struct file *f);
 extern int vfs_open(const struct path *, struct file *, const struct cred *);
 extern struct file *filp_clone_open(struct file *);
diff --git a/fs/open.c b/fs/open.c
index 949cef29c3bb..4d23f729dcc6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1078,6 +1078,26 @@ SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags,
 	return do_sys_open(dfd, filename, flags, mode);
 }
 
+#ifdef CONFIG_COMPAT
+/*
+ * Exactly like sys_open(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+COMPAT_SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode)
+{
+	return do_sys_open(AT_FDCWD, filename, flags, mode);
+}
+
+/*
+ * Exactly like sys_openat(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode)
+{
+	return do_sys_open(dfd, filename, flags, mode);
+}
+#endif
+
 #ifndef __alpha__
 
 /*
diff --git a/fs/read_write.c b/fs/read_write.c
index c4f88afbc67f..47c1d4484df9 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -841,6 +841,81 @@ out:
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+ssize_t compat_rw_copy_check_uvector(int type,
+		const struct compat_iovec __user *uvector, unsigned long nr_segs,
+		unsigned long fast_segs, struct iovec *fast_pointer,
+		struct iovec **ret_pointer)
+{
+	compat_ssize_t tot_len;
+	struct iovec *iov = *ret_pointer = fast_pointer;
+	ssize_t ret = 0;
+	int seg;
+
+	/*
+	 * SuS says "The readv() function *may* fail if the iovcnt argument
+	 * was less than or equal to 0, or greater than {IOV_MAX}.  Linux has
+	 * traditionally returned zero for zero segments, so...
+	 */
+	if (nr_segs == 0)
+		goto out;
+
+	ret = -EINVAL;
+	if (nr_segs > UIO_MAXIOV)
+		goto out;
+	if (nr_segs > fast_segs) {
+		ret = -ENOMEM;
+		iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+		if (iov == NULL)
+			goto out;
+	}
+	*ret_pointer = iov;
+
+	ret = -EFAULT;
+	if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+		goto out;
+
+	/*
+	 * Single unix specification:
+	 * We should -EINVAL if an element length is not >= 0 and fitting an
+	 * ssize_t.
+	 *
+	 * In Linux, the total length is limited to MAX_RW_COUNT, there is
+	 * no overflow possibility.
+	 */
+	tot_len = 0;
+	ret = -EINVAL;
+	for (seg = 0; seg < nr_segs; seg++) {
+		compat_uptr_t buf;
+		compat_ssize_t len;
+
+		if (__get_user(len, &uvector->iov_len) ||
+		   __get_user(buf, &uvector->iov_base)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		if (len < 0)	/* size_t not fitting in compat_ssize_t .. */
+			goto out;
+		if (type >= 0 &&
+		    !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		if (len > MAX_RW_COUNT - tot_len)
+			len = MAX_RW_COUNT - tot_len;
+		tot_len += len;
+		iov->iov_base = compat_ptr(buf);
+		iov->iov_len = (compat_size_t) len;
+		uvector++;
+		iov++;
+	}
+	ret = tot_len;
+
+out:
+	return ret;
+}
+#endif
+
 static ssize_t __do_readv_writev(int type, struct file *file,
 				 struct iov_iter *iter, loff_t *pos, int flags)
 {
diff --git a/fs/readdir.c b/fs/readdir.c
index 0e8a7f355f7a..89659549c09d 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -18,6 +18,7 @@
 #include <linux/security.h>
 #include <linux/syscalls.h>
 #include <linux/unistd.h>
+#include <linux/compat.h>
 
 #include <linux/uaccess.h>
 
@@ -324,3 +325,167 @@ SYSCALL_DEFINE3(getdents64, unsigned int, fd,
 	fdput_pos(f);
 	return error;
 }
+
+#ifdef CONFIG_COMPAT
+struct compat_old_linux_dirent {
+	compat_ulong_t	d_ino;
+	compat_ulong_t	d_offset;
+	unsigned short	d_namlen;
+	char		d_name[1];
+};
+
+struct compat_readdir_callback {
+	struct dir_context ctx;
+	struct compat_old_linux_dirent __user *dirent;
+	int result;
+};
+
+static int compat_fillonedir(struct dir_context *ctx, const char *name,
+			     int namlen, loff_t offset, u64 ino,
+			     unsigned int d_type)
+{
+	struct compat_readdir_callback *buf =
+		container_of(ctx, struct compat_readdir_callback, ctx);
+	struct compat_old_linux_dirent __user *dirent;
+	compat_ulong_t d_ino;
+
+	if (buf->result)
+		return -EINVAL;
+	d_ino = ino;
+	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+		buf->result = -EOVERFLOW;
+		return -EOVERFLOW;
+	}
+	buf->result++;
+	dirent = buf->dirent;
+	if (!access_ok(VERIFY_WRITE, dirent,
+			(unsigned long)(dirent->d_name + namlen + 1) -
+				(unsigned long)dirent))
+		goto efault;
+	if (	__put_user(d_ino, &dirent->d_ino) ||
+		__put_user(offset, &dirent->d_offset) ||
+		__put_user(namlen, &dirent->d_namlen) ||
+		__copy_to_user(dirent->d_name, name, namlen) ||
+		__put_user(0, dirent->d_name + namlen))
+		goto efault;
+	return 0;
+efault:
+	buf->result = -EFAULT;
+	return -EFAULT;
+}
+
+COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
+		struct compat_old_linux_dirent __user *, dirent, unsigned int, count)
+{
+	int error;
+	struct fd f = fdget_pos(fd);
+	struct compat_readdir_callback buf = {
+		.ctx.actor = compat_fillonedir,
+		.dirent = dirent
+	};
+
+	if (!f.file)
+		return -EBADF;
+
+	error = iterate_dir(f.file, &buf.ctx);
+	if (buf.result)
+		error = buf.result;
+
+	fdput_pos(f);
+	return error;
+}
+
+struct compat_linux_dirent {
+	compat_ulong_t	d_ino;
+	compat_ulong_t	d_off;
+	unsigned short	d_reclen;
+	char		d_name[1];
+};
+
+struct compat_getdents_callback {
+	struct dir_context ctx;
+	struct compat_linux_dirent __user *current_dir;
+	struct compat_linux_dirent __user *previous;
+	int count;
+	int error;
+};
+
+static int compat_filldir(struct dir_context *ctx, const char *name, int namlen,
+		loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct compat_linux_dirent __user * dirent;
+	struct compat_getdents_callback *buf =
+		container_of(ctx, struct compat_getdents_callback, ctx);
+	compat_ulong_t d_ino;
+	int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
+		namlen + 2, sizeof(compat_long_t));
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	d_ino = ino;
+	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+		buf->error = -EOVERFLOW;
+		return -EOVERFLOW;
+	}
+	dirent = buf->previous;
+	if (dirent) {
+		if (signal_pending(current))
+			return -EINTR;
+		if (__put_user(offset, &dirent->d_off))
+			goto efault;
+	}
+	dirent = buf->current_dir;
+	if (__put_user(d_ino, &dirent->d_ino))
+		goto efault;
+	if (__put_user(reclen, &dirent->d_reclen))
+		goto efault;
+	if (copy_to_user(dirent->d_name, name, namlen))
+		goto efault;
+	if (__put_user(0, dirent->d_name + namlen))
+		goto efault;
+	if (__put_user(d_type, (char  __user *) dirent + reclen - 1))
+		goto efault;
+	buf->previous = dirent;
+	dirent = (void __user *)dirent + reclen;
+	buf->current_dir = dirent;
+	buf->count -= reclen;
+	return 0;
+efault:
+	buf->error = -EFAULT;
+	return -EFAULT;
+}
+
+COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
+		struct compat_linux_dirent __user *, dirent, unsigned int, count)
+{
+	struct fd f;
+	struct compat_linux_dirent __user * lastdirent;
+	struct compat_getdents_callback buf = {
+		.ctx.actor = compat_filldir,
+		.current_dir = dirent,
+		.count = count
+	};
+	int error;
+
+	if (!access_ok(VERIFY_WRITE, dirent, count))
+		return -EFAULT;
+
+	f = fdget_pos(fd);
+	if (!f.file)
+		return -EBADF;
+
+	error = iterate_dir(f.file, &buf.ctx);
+	if (error >= 0)
+		error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		if (put_user(buf.ctx.pos, &lastdirent->d_off))
+			error = -EFAULT;
+		else
+			error = count - buf.count;
+	}
+	fdput_pos(f);
+	return error;
+}
+#endif
diff --git a/fs/select.c b/fs/select.c
index e2112270d75a..dd70937ddb60 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -338,6 +338,53 @@ sticky:
 	return ret;
 }
 
+/*
+ * Scalable version of the fd_set.
+ */
+
+typedef struct {
+	unsigned long *in, *out, *ex;
+	unsigned long *res_in, *res_out, *res_ex;
+} fd_set_bits;
+
+/*
+ * How many longwords for "nr" bits?
+ */
+#define FDS_BITPERLONG	(8*sizeof(long))
+#define FDS_LONGS(nr)	(((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)
+#define FDS_BYTES(nr)	(FDS_LONGS(nr)*sizeof(long))
+
+/*
+ * We do a VERIFY_WRITE here even though we are only reading this time:
+ * we'll write to it eventually..
+ *
+ * Use "unsigned long" accesses to let user-mode fd_set's be long-aligned.
+ */
+static inline
+int get_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+	nr = FDS_BYTES(nr);
+	if (ufdset)
+		return copy_from_user(fdset, ufdset, nr) ? -EFAULT : 0;
+
+	memset(fdset, 0, nr);
+	return 0;
+}
+
+static inline unsigned long __must_check
+set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+	if (ufdset)
+		return __copy_to_user(ufdset, fdset, FDS_BYTES(nr));
+	return 0;
+}
+
+static inline
+void zero_fd_set(unsigned long nr, unsigned long *fdset)
+{
+	memset(fdset, 0, FDS_BYTES(nr));
+}
+
 #define FDS_IN(fds, n)		(fds->in + n)
 #define FDS_OUT(fds, n)		(fds->out + n)
 #define FDS_EX(fds, n)		(fds->ex + n)
@@ -401,7 +448,7 @@ static inline void wait_key_set(poll_table *wait, unsigned long in,
 		wait->_key |= POLLOUT_SET;
 }
 
-int do_select(int n, fd_set_bits *fds, struct timespec64 *end_time)
+static int do_select(int n, fd_set_bits *fds, struct timespec64 *end_time)
 {
 	ktime_t expire, *to = NULL;
 	struct poll_wqueues table;
@@ -881,7 +928,7 @@ static int do_poll(struct poll_list *list, struct poll_wqueues *wait,
 #define N_STACK_PPS ((sizeof(stack_pps) - sizeof(struct poll_list))  / \
 			sizeof(struct pollfd))
 
-int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds,
+static int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds,
 		struct timespec64 *end_time)
 {
 	struct poll_wqueues table;
@@ -1053,3 +1100,373 @@ SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds,
 
 	return ret;
 }
+
+#ifdef CONFIG_COMPAT
+#define __COMPAT_NFDBITS       (8 * sizeof(compat_ulong_t))
+
+static
+int compat_poll_select_copy_remaining(struct timespec *end_time, void __user *p,
+				      int timeval, int ret)
+{
+	struct timespec ts;
+
+	if (!p)
+		return ret;
+
+	if (current->personality & STICKY_TIMEOUTS)
+		goto sticky;
+
+	/* No update for zero timeout */
+	if (!end_time->tv_sec && !end_time->tv_nsec)
+		return ret;
+
+	ktime_get_ts(&ts);
+	ts = timespec_sub(*end_time, ts);
+	if (ts.tv_sec < 0)
+		ts.tv_sec = ts.tv_nsec = 0;
+
+	if (timeval) {
+		struct compat_timeval rtv;
+
+		rtv.tv_sec = ts.tv_sec;
+		rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+
+		if (!copy_to_user(p, &rtv, sizeof(rtv)))
+			return ret;
+	} else {
+		struct compat_timespec rts;
+
+		rts.tv_sec = ts.tv_sec;
+		rts.tv_nsec = ts.tv_nsec;
+
+		if (!copy_to_user(p, &rts, sizeof(rts)))
+			return ret;
+	}
+	/*
+	 * If an application puts its timeval in read-only memory, we
+	 * don't want the Linux-specific update to the timeval to
+	 * cause a fault after the select has completed
+	 * successfully. However, because we're not updating the
+	 * timeval, we can't restart the system call.
+	 */
+
+sticky:
+	if (ret == -ERESTARTNOHAND)
+		ret = -EINTR;
+	return ret;
+}
+
+/*
+ * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
+ * 64-bit unsigned longs.
+ */
+static
+int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+			unsigned long *fdset)
+{
+	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
+	if (ufdset) {
+		unsigned long odd;
+
+		if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
+			return -EFAULT;
+
+		odd = nr & 1UL;
+		nr &= ~1UL;
+		while (nr) {
+			unsigned long h, l;
+			if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
+				return -EFAULT;
+			ufdset += 2;
+			*fdset++ = h << 32 | l;
+			nr -= 2;
+		}
+		if (odd && __get_user(*fdset, ufdset))
+			return -EFAULT;
+	} else {
+		/* Tricky, must clear full unsigned long in the
+		 * kernel fdset at the end, this makes sure that
+		 * actually happens.
+		 */
+		memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
+	}
+	return 0;
+}
+
+static
+int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+		      unsigned long *fdset)
+{
+	unsigned long odd;
+	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
+
+	if (!ufdset)
+		return 0;
+
+	odd = nr & 1UL;
+	nr &= ~1UL;
+	while (nr) {
+		unsigned long h, l;
+		l = *fdset++;
+		h = l >> 32;
+		if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
+			return -EFAULT;
+		ufdset += 2;
+		nr -= 2;
+	}
+	if (odd && __put_user(*fdset, ufdset))
+		return -EFAULT;
+	return 0;
+}
+
+
+/*
+ * This is a virtual copy of sys_select from fs/select.c and probably
+ * should be compared to it from time to time
+ */
+
+/*
+ * We can actually return ERESTARTSYS instead of EINTR, but I'd
+ * like to be certain this leads to no problems. So I return
+ * EINTR just for safety.
+ *
+ * Update: ERESTARTSYS breaks at least the xview clock binary, so
+ * I'm trying ERESTARTNOHAND which restart only when you want to.
+ */
+static int compat_core_sys_select(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct timespec *end_time)
+{
+	fd_set_bits fds;
+	void *bits;
+	int size, max_fds, ret = -EINVAL;
+	struct fdtable *fdt;
+	long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
+
+	if (n < 0)
+		goto out_nofds;
+
+	/* max_fds can increase, so grab it once to avoid race */
+	rcu_read_lock();
+	fdt = files_fdtable(current->files);
+	max_fds = fdt->max_fds;
+	rcu_read_unlock();
+	if (n > max_fds)
+		n = max_fds;
+
+	/*
+	 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
+	 * since we used fdset we need to allocate memory in units of
+	 * long-words.
+	 */
+	size = FDS_BYTES(n);
+	bits = stack_fds;
+	if (size > sizeof(stack_fds) / 6) {
+		bits = kmalloc(6 * size, GFP_KERNEL);
+		ret = -ENOMEM;
+		if (!bits)
+			goto out_nofds;
+	}
+	fds.in      = (unsigned long *)  bits;
+	fds.out     = (unsigned long *) (bits +   size);
+	fds.ex      = (unsigned long *) (bits + 2*size);
+	fds.res_in  = (unsigned long *) (bits + 3*size);
+	fds.res_out = (unsigned long *) (bits + 4*size);
+	fds.res_ex  = (unsigned long *) (bits + 5*size);
+
+	if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
+	    (ret = compat_get_fd_set(n, outp, fds.out)) ||
+	    (ret = compat_get_fd_set(n, exp, fds.ex)))
+		goto out;
+	zero_fd_set(n, fds.res_in);
+	zero_fd_set(n, fds.res_out);
+	zero_fd_set(n, fds.res_ex);
+
+	ret = do_select(n, &fds, end_time);
+
+	if (ret < 0)
+		goto out;
+	if (!ret) {
+		ret = -ERESTARTNOHAND;
+		if (signal_pending(current))
+			goto out;
+		ret = 0;
+	}
+
+	if (compat_set_fd_set(n, inp, fds.res_in) ||
+	    compat_set_fd_set(n, outp, fds.res_out) ||
+	    compat_set_fd_set(n, exp, fds.res_ex))
+		ret = -EFAULT;
+out:
+	if (bits != stack_fds)
+		kfree(bits);
+out_nofds:
+	return ret;
+}
+
+COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,
+	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+	struct compat_timeval __user *, tvp)
+{
+	struct timespec end_time, *to = NULL;
+	struct compat_timeval tv;
+	int ret;
+
+	if (tvp) {
+		if (copy_from_user(&tv, tvp, sizeof(tv)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to,
+				tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
+				(tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
+			return -EINVAL;
+	}
+
+	ret = compat_core_sys_select(n, inp, outp, exp, to);
+	ret = compat_poll_select_copy_remaining(&end_time, tvp, 1, ret);
+
+	return ret;
+}
+
+struct compat_sel_arg_struct {
+	compat_ulong_t n;
+	compat_uptr_t inp;
+	compat_uptr_t outp;
+	compat_uptr_t exp;
+	compat_uptr_t tvp;
+};
+
+COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg)
+{
+	struct compat_sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
+				 compat_ptr(a.exp), compat_ptr(a.tvp));
+}
+
+static long do_compat_pselect(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
+	compat_size_t sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t ksigmask, sigsaved;
+	struct compat_timespec ts;
+	struct timespec end_time, *to = NULL;
+	int ret;
+
+	if (tsp) {
+		if (copy_from_user(&ts, tsp, sizeof(ts)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
+			return -EINVAL;
+	}
+
+	if (sigmask) {
+		if (sigsetsize != sizeof(compat_sigset_t))
+			return -EINVAL;
+		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+			return -EFAULT;
+		sigset_from_compat(&ksigmask, &ss32);
+
+		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
+		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+	}
+
+	ret = compat_core_sys_select(n, inp, outp, exp, to);
+	ret = compat_poll_select_copy_remaining(&end_time, tsp, 0, ret);
+
+	if (ret == -ERESTARTNOHAND) {
+		/*
+		 * Don't restore the signal mask yet. Let do_signal() deliver
+		 * the signal on the way back to userspace, before the signal
+		 * mask is restored.
+		 */
+		if (sigmask) {
+			memcpy(&current->saved_sigmask, &sigsaved,
+					sizeof(sigsaved));
+			set_restore_sigmask();
+		}
+	} else if (sigmask)
+		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+	return ret;
+}
+
+COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
+	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+	struct compat_timespec __user *, tsp, void __user *, sig)
+{
+	compat_size_t sigsetsize = 0;
+	compat_uptr_t up = 0;
+
+	if (sig) {
+		if (!access_ok(VERIFY_READ, sig,
+				sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
+		    	__get_user(up, (compat_uptr_t __user *)sig) ||
+		    	__get_user(sigsetsize,
+				(compat_size_t __user *)(sig+sizeof(up))))
+			return -EFAULT;
+	}
+	return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
+				 sigsetsize);
+}
+
+COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
+	unsigned int,  nfds, struct compat_timespec __user *, tsp,
+	const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t ksigmask, sigsaved;
+	struct compat_timespec ts;
+	struct timespec end_time, *to = NULL;
+	int ret;
+
+	if (tsp) {
+		if (copy_from_user(&ts, tsp, sizeof(ts)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
+			return -EINVAL;
+	}
+
+	if (sigmask) {
+		if (sigsetsize != sizeof(compat_sigset_t))
+			return -EINVAL;
+		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+			return -EFAULT;
+		sigset_from_compat(&ksigmask, &ss32);
+
+		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
+		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+	}
+
+	ret = do_sys_poll(ufds, nfds, to);
+
+	/* We can restart this syscall, usually */
+	if (ret == -EINTR) {
+		/*
+		 * Don't restore the signal mask yet. Let do_signal() deliver
+		 * the signal on the way back to userspace, before the signal
+		 * mask is restored.
+		 */
+		if (sigmask) {
+			memcpy(&current->saved_sigmask, &sigsaved,
+				sizeof(sigsaved));
+			set_restore_sigmask();
+		}
+		ret = -ERESTARTNOHAND;
+	} else if (sigmask)
+		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+	ret = compat_poll_select_copy_remaining(&end_time, tsp, 0, ret);
+
+	return ret;
+}
+#endif
diff --git a/fs/stat.c b/fs/stat.c
index a257b872a53d..f494b182c7c7 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -15,6 +15,7 @@
 #include <linux/cred.h>
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
+#include <linux/compat.h>
 
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
@@ -575,6 +576,91 @@ SYSCALL_DEFINE5(statx,
 	return cp_statx(&stat, buffer);
 }
 
+#ifdef CONFIG_COMPAT
+static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
+{
+	struct compat_stat tmp;
+
+	if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
+		return -EOVERFLOW;
+
+	memset(&tmp, 0, sizeof(tmp));
+	tmp.st_dev = old_encode_dev(stat->dev);
+	tmp.st_ino = stat->ino;
+	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
+		return -EOVERFLOW;
+	tmp.st_mode = stat->mode;
+	tmp.st_nlink = stat->nlink;
+	if (tmp.st_nlink != stat->nlink)
+		return -EOVERFLOW;
+	SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
+	SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
+	tmp.st_rdev = old_encode_dev(stat->rdev);
+	if ((u64) stat->size > MAX_NON_LFS)
+		return -EOVERFLOW;
+	tmp.st_size = stat->size;
+	tmp.st_atime = stat->atime.tv_sec;
+	tmp.st_atime_nsec = stat->atime.tv_nsec;
+	tmp.st_mtime = stat->mtime.tv_sec;
+	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
+	tmp.st_ctime = stat->ctime.tv_sec;
+	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
+	tmp.st_blocks = stat->blocks;
+	tmp.st_blksize = stat->blksize;
+	return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
+		       struct compat_stat __user *, statbuf)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_stat(filename, &stat);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+
+COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename,
+		       struct compat_stat __user *, statbuf)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_lstat(filename, &stat);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+
+#ifndef __ARCH_WANT_STAT64
+COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd,
+		       const char __user *, filename,
+		       struct compat_stat __user *, statbuf, int, flag)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_fstatat(dfd, filename, &stat, flag);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+#endif
+
+COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
+		       struct compat_stat __user *, statbuf)
+{
+	struct kstat stat;
+	int error = vfs_fstat(fd, &stat);
+
+	if (!error)
+		error = cp_compat_stat(&stat, statbuf);
+	return error;
+}
+#endif
+
 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
 void __inode_add_bytes(struct inode *inode, loff_t bytes)
 {
diff --git a/fs/statfs.c b/fs/statfs.c
index 13ae259d4879..4e4623c7a126 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -7,6 +7,7 @@
 #include <linux/statfs.h>
 #include <linux/security.h>
 #include <linux/uaccess.h>
+#include <linux/compat.h>
 #include "internal.h"
 
 static int flags_by_mnt(int mnt_flags)
@@ -239,3 +240,142 @@ SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
 
 	return copy_to_user(ubuf, &tmp, sizeof(struct ustat)) ? -EFAULT : 0;
 }
+
+#ifdef CONFIG_COMPAT
+static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
+{
+	if (sizeof ubuf->f_blocks == 4) {
+		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
+			return -EOVERFLOW;
+		/* f_files and f_ffree may be -1; it's okay
+		 * to stuff that into 32 bits */
+		if (kbuf->f_files != 0xffffffffffffffffULL
+		 && (kbuf->f_files & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+		if (kbuf->f_ffree != 0xffffffffffffffffULL
+		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+	}
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+	    __put_user(kbuf->f_type, &ubuf->f_type) ||
+	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+	    __put_user(kbuf->f_files, &ubuf->f_files) ||
+	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+	    __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+	    __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
+		return -EFAULT;
+	return 0;
+}
+
+/*
+ * The following statfs calls are copies of code from fs/statfs.c and
+ * should be checked against those from time to time
+ */
+COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
+{
+	struct kstatfs tmp;
+	int error = user_statfs(pathname, &tmp);
+	if (!error)
+		error = put_compat_statfs(buf, &tmp);
+	return error;
+}
+
+COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
+{
+	struct kstatfs tmp;
+	int error = fd_statfs(fd, &tmp);
+	if (!error)
+		error = put_compat_statfs(buf, &tmp);
+	return error;
+}
+
+static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
+{
+	if (sizeof(ubuf->f_bsize) == 4) {
+		if ((kbuf->f_type | kbuf->f_bsize | kbuf->f_namelen |
+		     kbuf->f_frsize | kbuf->f_flags) & 0xffffffff00000000ULL)
+			return -EOVERFLOW;
+		/* f_files and f_ffree may be -1; it's okay
+		 * to stuff that into 32 bits */
+		if (kbuf->f_files != 0xffffffffffffffffULL
+		 && (kbuf->f_files & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+		if (kbuf->f_ffree != 0xffffffffffffffffULL
+		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+	}
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+	    __put_user(kbuf->f_type, &ubuf->f_type) ||
+	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+	    __put_user(kbuf->f_files, &ubuf->f_files) ||
+	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+	    __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+	    __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
+		return -EFAULT;
+	return 0;
+}
+
+COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
+{
+	struct kstatfs tmp;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = user_statfs(pathname, &tmp);
+	if (!error)
+		error = put_compat_statfs64(buf, &tmp);
+	return error;
+}
+
+COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
+{
+	struct kstatfs tmp;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = fd_statfs(fd, &tmp);
+	if (!error)
+		error = put_compat_statfs64(buf, &tmp);
+	return error;
+}
+
+/*
+ * This is a copy of sys_ustat, just dealing with a structure layout.
+ * Given how simple this syscall is that apporach is more maintainable
+ * than the various conversion hacks.
+ */
+COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
+{
+	struct compat_ustat tmp;
+	struct kstatfs sbuf;
+	int err = vfs_ustat(new_decode_dev(dev), &sbuf);
+	if (err)
+		return err;
+
+	memset(&tmp, 0, sizeof(struct compat_ustat));
+	tmp.f_tfree = sbuf.f_bfree;
+	tmp.f_tinode = sbuf.f_ffree;
+	if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
+		return -EFAULT;
+	return 0;
+}
+#endif
diff --git a/fs/utimes.c b/fs/utimes.c
index 32b15b3f6629..6571d8c848a0 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -1,14 +1,10 @@
-#include <linux/compiler.h>
 #include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/linkage.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
-#include <linux/sched.h>
-#include <linux/stat.h>
 #include <linux/utime.h>
 #include <linux/syscalls.h>
 #include <linux/uaccess.h>
+#include <linux/compat.h>
 #include <asm/unistd.h>
 
 #ifdef __ARCH_WANT_SYS_UTIME
@@ -219,3 +215,63 @@ SYSCALL_DEFINE2(utimes, char __user *, filename,
 {
 	return sys_futimesat(AT_FDCWD, filename, utimes);
 }
+
+#ifdef CONFIG_COMPAT
+/*
+ * Not all architectures have sys_utime, so implement this in terms
+ * of sys_utimes.
+ */
+COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
+		       struct compat_utimbuf __user *, t)
+{
+	struct timespec tv[2];
+
+	if (t) {
+		if (get_user(tv[0].tv_sec, &t->actime) ||
+		    get_user(tv[1].tv_sec, &t->modtime))
+			return -EFAULT;
+		tv[0].tv_nsec = 0;
+		tv[1].tv_nsec = 0;
+	}
+	return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
+}
+
+COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags)
+{
+	struct timespec tv[2];
+
+	if  (t) {
+		if (compat_get_timespec(&tv[0], &t[0]) ||
+		    compat_get_timespec(&tv[1], &t[1]))
+			return -EFAULT;
+
+		if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
+			return 0;
+	}
+	return do_utimes(dfd, filename, t ? tv : NULL, flags);
+}
+
+COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)
+{
+	struct timespec tv[2];
+
+	if (t) {
+		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
+		    get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
+		    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
+		    get_user(tv[1].tv_nsec, &t[1].tv_usec))
+			return -EFAULT;
+		if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
+		    tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
+			return -EINVAL;
+		tv[0].tv_nsec *= 1000;
+		tv[1].tv_nsec *= 1000;
+	}
+	return do_utimes(dfd, filename, t ? tv : NULL, 0);
+}
+
+COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)
+{
+	return compat_sys_futimesat(AT_FDCWD, filename, t);
+}
+#endif